Comparison

Calculator # vs slimpic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calculator #

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Highlights
  • Math Photos Solver
  • Handwriting Recognition
  • AI Math Problem Solver
  • Mathematical Display
  • Equation Solvers
  • 2D Graphing
  • Algebraic Functions
Features
Read full description

◉ Over 11,000,000 Downloads Worldwide ◉ Top Free Utilities Apps in US, UK, AUS, CAN, GER,... ◉ Rated & Reviewed on ILoveFreeSoftware.com FREE Alternative to Graphing TI-83, TI-84, TI-89, Casio FX, Sharp EL,... Calculator # – The free, multi-function calculator for iPhone/iPad is proud to offer a variety of features to satisfy wide ranges of customers: The App possesses a powerful math core and algebra engine with mathematical display support, making it a viable tool for everyone from those looking for basic calculation to more advanced users, such as scientific computation, engineers, and math students. Calculator # makes available everything you need – including a user manual and tutorial video clips – so you can master the app in a matter of minutes! ◉ Official Website: http://iPhoneCalculator.com ◉ ADVANCED FEATURES: ▸ Math Photos Solver * ▸ Handwriting Recognition * ▸ Math Problem Solver (AI) * ◉ GENERAL FEATURES: ▸ Universal Calculator App ▸ Support All the Latest Devices ¹ ▸ Support Multitasking (iPad) ▸ Support Wireless KB ² ▸ Mathematical Display ▸ Edit & Export Expression/Result ▸ History Tape View ▸ Basic Calculations (+, -, x, ÷, %, Abs,...) ▸ Advanced Functions (Sin,Cos,Ln,X!, ^, √,…) ▸ 14 Memory Variables (Including X,Y,Z,M) ▸ Assignment Operator ▸ F(x) Customize Functions (F1 Only) ▸ Fraction and Degree/Angle Calculation ▸ Numeric Integral Calculation ▸ Dual Skins (Silver Light & Carbon+) ◉ ALGEBRA FEATURES: ▸ Big Integer & Rational Number (Up to 30!) ▸ Expand and Factor Polynomials ▸ Basic Indefinite integral ◉ EQUATIONS SOLVERS: ▸ Quadratic Equations ▸ System of Linear Equations (2 Unknowns) ◉ 2D GRAPH: ▸ Snap to Points ▸ Smooth Zoom & Transformation ▸ Support F(X,Y) = 0. E.g. Sin(X) + Cos(Y) = 0. ◉ MULTIPLE LANGUAGES: ▸ English, Spanish, German, ▸ French, Japanese, Chinese (*) In-App-Purchase is required ¹: Include iPhone 6/6S+ HD Retina Display ²: Standard English KB We love your feedback, Thanks a lot ! Terms of Service: https://iphonecalculator.com/terms-of-service/

About

slimpic

This iOS app quickly compresses photos while maintaining high quality, freeing up iPhone storage. It securely removes sensitive EXIF and location data, offering a user-friendly experience for efficient photo management.

Highlights
  • High-speed background compression
  • Smart resolution optimization
  • Adjustable quality control
  • Automatic HEIC/HEIF to JPEG conversion
  • 100% on-device processing
  • EXIF and GPS data removal
Features
Read full description

*SlimPic 1.0 – 빠르고 안전한 사진 압축 앱 iPhone 저장 공간이 부족해 불편했던 적 있으신가요? SlimPic은 고품질을 유지하면서 사진 용량을 크게 줄여주는 iOS 전용 사진 압축 앱입니다. 몇 번의 탭만으로 저장 공간을 확보하고 민감한 EXIF 및 위치 정보를 안전하게 제거하세요. 주요 기능 *초고속 압축 -백그라운드 고속 처리로 앱이 멈추지 않고 많은 이미지를 빠르게 압축 -스마트 해상도 최적화로 파일 크기에 맞춘 자동 비율 조정 -10%에서 100%까지 세밀한 품질 조절 가능 -강제 압축 모드로 원본보다 작아질 때까지 품질과 해상도를 자동 조정 -HEIC와 HEIF 파일을 JPEG로 자동 변환 -전후 비교 기능 제공으로 품질 차이를 즉시 확인 *완벽한 개인정보 보호 -모든 작업은 100% 기기 내부에서 처리 -어떤 이미지도 외부 서버로 전송되지 않음 -EXIF 카메라 정보 자동 삭제 -GPS 위치 정보 완전 제거 *편리한 사용성 -간단한 이미지 선택 인터페이스 -절약된 용량과 압축률을 실시간으로 확인 -압축된 이미지를 DCIM/SlimPic 폴더에 자동 저장 -앱 내 그리드 화면에서 이미지 관리 -메시지와 SNS로 빠르게 공유 가능 *SlimPic이 필요한 사용자 -iPhone 저장 공간이 부족한 사용자 -SNS 또는 블로그 업로드용으로 최적 크기의 이미지를 원하는 사용자 -사진의 위치 정보나 EXIF 데이터를 삭제해야 하는 사용자 -빠르고 간편한 압축 기능을 선호하는 사용자 *지금 SlimPic 1.0을 다운로드하고 사진 관리를 한 단계 업그레이드하세요!*

Screenshots

Calculator #4 screens
slimpic4 screens

Verdict

The call

The clearest difference is in-app purchases: slimpic at none against Calculator #'s 6. slimpic also leads on ads (none vs shown) and update cadence (daily vs every 2 months). Calculator #'s advantage is ratings volume (36K vs 1). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculator # sells 6 in-app purchases, starting at $1.49 per month. slimpic asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

slimpic holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Calculator # ships an update every 2 months, slimpic daily. The most recent releases landed on October 19, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 4 level
Calculator # versus slimpic: the parameters behind the verdict, then further details
ParameterCalculator #slimpic
PriceFreeFree
Rating4.6 (36K ratings)5.0 (1 ratings) — better
Positive reviews59.7% of reviews—
Number of ratings36K — better1
Update frequencyEvery 2 monthsDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better13.0
Further details — not scored
Size57 MB26 MB
Age rating4+4+
DeveloperIncpt.Mobiszzari

Customer experience

Calculator #

All ratings35,876 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews466 reviews
Positive59.7%
Neutral6.4%
Negative33.9%

slimpic

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Calculator #

Reported bugs

3 issues
  • Crashes when trying to use certain functions
  • Handwriting recognition not working reliably
  • Inability to input negative numbers

Requested features

3 requests
  • Add option to turn off animation
  • Improve ad placement to avoid obstructing usage
  • Provide more transparency on paid features

slimpic

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Calculator #

Subscriptions4
  • PRO Upgrade 1 Month3 Days trial$1.491 Month
  • PRO Upgrade 3 Months7 Days trial$2.993 Months
  • PRO + Recognition 1 Month$4.991 Month
Show 1 more
  • PRO + Recognition 3 Months$11.993 Months
One-time2
  • 250 AI Recognition & Queries$0.99
  • 600 AI Recognition & Queries$1.99
None

slimpic

No in-app purchases

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is slimpic free?
slimpic is free to download, with no in-app purchases.
Which has better reviews, Calculator # or slimpic?
slimpic is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while slimpic averages 5.0 from 1 ratings.
Do Calculator # or slimpic have ads?
Calculator # shows ads; slimpic does not.
Which is updated more often, Calculator # or slimpic?
Calculator # ships an update every 2 months, and slimpic daily. Most recently, Calculator # was updated on October 19, 2026 and slimpic on October 13, 2026.

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